Dunno about $30. I'd shy away from a $30 quadrail. Probably make of pot metal (weak) and heavy. Of all the ones I've handled I really like the Daniel Defense Lite. Its really light and nice to hold, BUT very expensive and hard to find.

Goodluck!

__________________Assumption is the mother of all ****ups.Know what you know, Know what you don't know. -Paul Pedzolt"Jack of all trades, master of none, though oftentimes better than master of one" -Mynshul

Don't cheap out on components for your rifle. Find what you like and spend good money on it. Crap parts add no resale value to your gun and you're gonna have a big fat sad face when your cheap AR15 takes a big fat crap on you.